CV0-003 · Question #394
Which of the following is BEST suited to achieve storage path redundancy?
The correct answer is D. MPIO. MPIO (Multipath I/O) is specifically designed to provide redundant physical paths between a host server and its storage, preventing a single path failure from causing an outage.
Question
Which of the following is BEST suited to achieve storage path redundancy?
Options
- AReplication
- BLoad balancing
- CiSCSI
- DMPIO
How the community answered
(67 responses)- A3% (2)
- B1% (1)
- C1% (1)
- D94% (63)
Why each option
MPIO (Multipath I/O) is specifically designed to provide redundant physical paths between a host server and its storage, preventing a single path failure from causing an outage.
Replication copies data to a secondary storage system for disaster recovery, but does not provide redundancy for the physical paths to the primary storage.
Load balancing distributes workloads across multiple servers or network links but does not specifically address storage path redundancy between a host and storage device.
iSCSI is a storage networking protocol that encapsulates SCSI commands over TCP/IP - it is a transport mechanism, not a path redundancy solution by itself.
MPIO creates multiple independent I/O paths between a server and a storage device, so if one path fails due to a cable, HBA, or switch failure, I/O continues over alternate paths without interruption. This is the definitive solution for storage path redundancy, distinguishing path-level fault tolerance from data-level replication.
Concept tested: Multipath I/O for storage path redundancy
Source: https://learn.microsoft.com/en-us/windows-hardware/drivers/storage/introduction-to-multipath-i-o
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